Description:
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when doing an ldap_add() with "Die" as a persons last name, the server returns unwilling to perform. If I change only the last name to "Die2" it operates as expected. In our environment the following user attributes are associated with the last name.

sn
cn
displayName
distinguishedName
sAMAccountName
mailNickname
userPrincipalName
unicodePwd

The ldap directory is Microsoft Active Directory on Windows Server 2003

Reproduce code:
---------------
<?php
$user_attributes['sAMAccountName'] = "tdie";
$user_attributes['mailNickname'] = "tdie";
$user_attributes['userPrincipalName'] = "tdie@domain.com";
$user_attributes['unicodePwd'] = "\"\000t\000d\000i\000e\000\"\000";
$user_attributes['givenName'] = "Test";
$user_attributes['sn'] = "Die";
$user_attributes['cn'] = "Die, Test";
$user_attributes['displayName'] = "Die, Test";
$user_attributes['objectClass'][0] = "top";
$user_attributes['objectClass'][1] = "person";
$user_attributes['objectClass'][2] = "organizationalPerson";
$user_attributes['objectClass'][3] = "user";
//$gc_con previously set to valid ldap_connect()
ldap_add($gc_con, "CN=Die\, Test,OU=Users,DC=Domain,DC=Com", $user_attributes);
?>

Expected result:
----------------
We should expect the object to be added to the directory.

Actual result:
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Error: Add: Server unwilling to perform...